Clutch master cylinder - SINOTRUK (HOWO) LIMITED
Clutch releasing bearing
Clutch releasing bearing

Clutch master cylinder

Clutch master cylinder Introduction

A clutch master cylinder is a component found on vehicles equipped with manual transmission, and serves as the pump for the hydraulically operated clutch system. When the clutch pedal is pressed, the clutch master cylinder pushes fluid through the system down to the clutch slave cylinder so that it may disengage the clutch.
As they are hydraulic in nature, clutch master cylinders are often prone to issues with leaks that will interfere with its ability to displace fluid. When the clutch master cylinder has problems, it can lead to issues with the clutch pedal and shifting gears. Usually a bad or failing clutch master cylinder will produce a few symptoms that can notify the driver that a potential problem has occurred and should be serviced.

Low or dirty clutch fluid

One of the first symptoms commonly associated with a potential problem with the clutch master cylinder is low or dirty fluid in the reservoir. Dirty fluid can be caused by the seals inside the master cylinder breaking down due to wear and old age and contaminating the fluid. Aging seals are also increasingly prone to leaks as time goes on. Low fluid may be a symptom of a potential leak somewhere in the system, either at the clutch master or perhaps slave cylinder.

Abnormal clutch pedal behavior

Abnormal pedal pressure is another potential symptom of master cylinder damage or malfunction. If the cylinder has internal problems, it will directly affect the feeling of the pedal. A leaking air cylinder may cause the pedal to feel mushy or spongy, and in more serious cases, it may cause the pedal to sink to the floor and stay there when depressed.
Clutch master cylinders are an important part. If any problems are found, they will quickly cause problems that affect the overall driving performance of the vehicle. If your vehicle shows any of the above symptoms, or you suspect a problem with the master cylinder, have a professional technician inspect the vehicle to determine whether the vehicle needs to replace the clutch master cylinder.

Clutch master cylinder Picture

Checking a Clutch master cylinder system

The clutch master cylinder is usually found on the bulkhead next to the brake cylinder. Usually each cylinder is directly in front of its pedal, so the clutch cylinder is the one on the right as you look from the front of the car.
Brakes with servo assistance may have a different arrangement, but it should be clear which cylinder is which.
If the clutch fluid is low, look all over both master and slave cylinders and the pipe that connects them for signs of a leak. Pull back the lip of the dust cover on both cylinders. If there is hydraulic fluid inside the cover the piston seal is worn or damaged or the cylinder may be scored.
If you find a leak, remove the faulty part and overhaul or replace it.
If you can find no trace of a leak, fitting a complete service kit to both cylinders may cure the trouble.
If the fluid level is normal but the clutch 'drags' (will not disengage properly), and particularly if the pedal feels spongy, there is air in the system. Bleed the system .
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